Allow choice of trust region radius in nist.cc
Allow choice of trust region radius in nist.cc

Change-Id: I0a03b7b6da14af22117685d5f31b06ef384a7ced

DougFirErickson/ceres-solver,jmwalls/ceres-solver-fork,timfel/ceres-bin,timfel/ceres-bin,whuaegeanse/ceres-solver,jmwalls/ceres-solver-fork,entylop/ceres-solver,DougFirErickson/ceres-solver,entylop/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,entylop/ceres-solver,stonier/ceres_solver,DougFirErickson/ceres-solver,kartikkumar/ceres-solver,kartikkumar/ceres-solver,ysonggit/ceres-solver,ikoruk/ceres-solver,jmwalls/ceres-solver-fork,whuaegeanse/ceres-solver,timfel/ceres-bin,ikoruk/ceres-solver,ysonggit/ceres-solver,ikoruk/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,jmwalls/ceres-solver-fork,DougFirErickson/ceres-solver,stonier/ceres_solver,timfel/ceres-bin,kartikkumar/ceres-solver,entylop/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,stonier/ceres_solver